app-preview-img {

  .backIcon {
    position: absolute;
    top: 16px;
    left: 16px;
    font-size: 24px;
    z-index: 9999;
    color: grey;
  }

  // pinch-zoom组件里面的图片上下居中
  pinch-zoom {
    div {
      min-height: 100%;
    }
  }
}
